YES. Under special conditions or circumstances a heart attack, usually considered a natural death, resulting from coronary artery disease (CAD), might be considered an accidental death. This is a legal and medical question, but there are numerous USA coroner cases where the courts found some heart attacks to be accidental deaths.
The conditions and circumstances to support a determination of accidental death include (a) Taking certain drugs, such as cocaine; (b) smoking cigarettes; (c) suffering emotional stress or pain; and (d) being exposed to extreme cold.
One example would be an elderly woman who has been in a rear end collision. She is already in shock from the trauma of the crash and sees her husband bleeding from the head, un-moving and leaning against the steering wheel. Thinking he is dead, she panics, becomes hysterical and causes excessive adrenalin to enter her system which causes the accumulated plaque in her coronary artery to rip off as a clot. That is turn blocks the artery, cutting off the heart's own blood flow which begins to kill the heart muscle. She may die in minutes or hours later in a hospital if her heart condition is not detected soon enough. The accident exacerbated her condition; her's was not a natural death.
No, natural death
It is usually called 'Asphyxiation'. But depending if it was done purposefully or by an accidental cause; the terms may differ.
It depends on the circumstances.
Choking to death
If no one pushed you, yes.
Kevin Gilbert, a talented musician and songwriter, passed away in 1996 at the age of 29. His death was ruled as accidental and was attributed to carbon monoxide poisoning. Gilbert's sudden and tragic death was a great loss to the music industry and his many fans around the world.
If the policy was an accidental death policy, probably. Accidental death usually relates to accidents on common carriers such as a plane, train, automobile,or bus. An OD would not be considered an accidental death.
It can cause death by asphyxiation.
Asphyxiation
His death was accidental.
Mark Fidrych, former Major League Baseball pitcher, passed away in 2009 from accidental asphyxiation on his farm. He was working underneath a dump truck when its bed lowered and pinned him, causing his death.
An asphyxiant is a substance which causes death or injury by lack of oxygen.